CN113215425A - Impurity removal process for alloy lining plate during production - Google Patents
Impurity removal process for alloy lining plate during production Download PDFInfo
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- CN113215425A CN113215425A CN202110493090.2A CN202110493090A CN113215425A CN 113215425 A CN113215425 A CN 113215425A CN 202110493090 A CN202110493090 A CN 202110493090A CN 113215425 A CN113215425 A CN 113215425A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/064—Obtaining aluminium refining using inert or reactive gases
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses an impurity removal process for producing an alloy lining plate, which belongs to the technical field of alloy lining plate processing and comprises the following steps: s1, taking an aluminum ingot, cutting an oxide layer on the surface of the aluminum ingot, S2, putting the stirring spoon, the slag-removing spoon and the casting mold into a drying box for preheating, wherein in the invention, degassing gas is blown into aluminum liquid by adopting a rotary graphite rotor, large bubbles are broken into very small bubbles and dispersed in the aluminum liquid, hydrogen is diffused into the bubbles according to a partial pressure law, and when the bubbles rise to the surface of the liquid, the hydrogen is taken into the atmosphere, so that a good degassing effect is achieved, meanwhile, in the smelting process of the alloy, a covering agent isolates alloy liquid from furnace gas, so that the alloy gas suction, oxidation and evaporation are reduced, the alloy is effectively stripped and separated from an aluminum smelting furnace, the slag and the aluminum are separated, the loss of the aluminum is reduced, and a refining agent can remove non-metallic inclusions and gas in the alloy liquid, so that the quality of the prepared alloy lining plate is improved.
Description
Technical Field
The invention relates to the technical field of alloy lining plate processing, in particular to an impurity removal process during alloy lining plate production.
Background
The aluminum alloy is widely applied to the fields of aviation industry, automobile industry, civil industry and the like due to the characteristics of small specific gravity, high strength, high hardness, good processing performance, excellent welding performance and the like, the alloy lining plate is an alloy material which is widely used, the alloy lining plate is used for protecting the cylinder body, so that the cylinder body is prevented from being directly impacted and abraded by a grinding body and materials, and meanwhile, the motion state of the grinding body can be adjusted by utilizing lining plates in different forms, so that the grinding effect of the grinding body on the materials is enhanced, the grinding efficiency of a grinding machine is improved, the yield is increased, and the metal consumption is reduced.
However, in the conventional production of the alloy lining plate, the content of hydrogen and impurities in the aluminum alloy liquid is high, which affects the mechanical property of the aluminum alloy and further affects the quality of the alloy lining plate, and meanwhile, when an aluminum ingot is smelted, the aluminum alloy liquid can absorb, oxidize and evaporate, which increases the consumption of aluminum materials and production cost, and the aluminum alloy liquid is difficult to strip from the smelting furnace, which cannot meet the production requirements of the alloy lining plate.
Disclosure of Invention
The invention aims to provide an impurity removal process during alloy lining plate production, wherein degassing gas is blown into aluminum liquid by a rotary graphite rotor, large bubbles are broken into very small bubbles and dispersed in the aluminum liquid, hydrogen is diffused into the bubbles according to a partial pressure law, and when the bubbles rise to the surface of the liquid, the hydrogen is brought into the atmosphere, so that a good degassing effect is achieved.
In order to achieve the above effects, the present invention provides the following technical solutions:
an impurity removal process for producing an alloy lining plate comprises the following steps:
and S1, taking the aluminum ingot, and cutting an oxide layer on the surface of the aluminum ingot.
S2, placing the stirring spoon, the slag removing spoon and the casting mould into a drying box and preheating to 250 ℃.
And S3, putting the aluminum ingot into a smelting furnace for melting to obtain molten aluminum.
And S4, degassing the aluminum melt.
And S5, adding an additive into the degassed aluminum melt to prepare an alloy melt.
And S6, casting the alloy melt into the casting mold, removing the casting mold after the alloy melt is completely solidified, and cooling the cast ingot in cooling sand.
As a further scheme of the invention: in step S3, the method for melting an aluminum ingot includes the steps of:
s301, preheating a smelting furnace.
S302, putting the aluminum ingot into a smelting furnace, and completely melting the aluminum ingot under the condition that the temperature of the smelting furnace is 720 ℃.
As a further scheme of the invention: in the step S4, degassing the aluminum melt includes the steps of:
s401, inserting a graphite rotor of a rotary degasser into the aluminum melt.
S402, the rotary graphite rotor sends degassing gas into the aluminum melt.
As a further scheme of the invention: the degassing gas is one of nitrogen and argon.
As a further scheme of the invention: in the step S402, the rotation speed of the rotary graphite rotor is 200-350 r/min.
As a further scheme of the invention: in the step S5, the additive materials are copper particles, magnesium strips and zinc particles, and the alloy melt is prepared after the additive materials are added, including the following steps:
s501, adding the copper particles into a smelting furnace at the temperature of 720 ℃, stirring the molten liquid by using a stirring spoon, uniformly scattering a covering agent on the molten liquid after the copper particles are completely molten, and taking out slag in the molten liquid by using a slag removing spoon.
S502, heating the smelting furnace to 650 ℃, pressing the magnesium strip into the melt, stirring the melt by using a stirring spoon, and covering by using a covering agent.
And S503, slagging off the molten liquid in the step S502 again, adding zinc particles, stirring the molten liquid by using a stirring spoon, uniformly scattering a covering agent on the molten liquid again, and slagging off.
As a further scheme of the invention: the covering agent is graphite powder.
As a further scheme of the invention: in step S502, the magnesium strip is wrapped with aluminum foil and pressed into the melt.
As a further scheme of the invention: in step S5, after the additive is added to the degassed aluminum melt, the method further includes: and pressing a refining agent into the molten liquid, and covering a smelting furnace cover when no yellow gas is emitted, so as to fully refine the molten liquid.
As a further scheme of the invention: the refining agent is hexachloroethane.
The invention provides an impurity removal process for producing an alloy lining plate, which has the following beneficial effects:
(1) in the invention, the rotary graphite rotor is adopted to blow degassing gas into the aluminum liquid, large bubbles are broken into very small bubbles and dispersed in the aluminum liquid, the surface area of the purified gas is sharply increased by reducing the diameter of the bubbles, so that more bubble surfaces are contacted with hydrogen and impurities in the aluminum liquid, on the contact surface of the bubbles and metal, because pressure difference exists between the hydrogen pressure in the aluminum liquid and the degassing bubbles in the aluminum liquid, the hydrogen diffuses into the degassing bubbles according to the partial pressure law, and gradually slows down as the hydrogen pressure in the degassing bubbles is close to the hydrogen pressure in the aluminum liquid, and when the degassing bubbles rise to the surface of the aluminum liquid, the hydrogen is carried into the atmosphere, thereby achieving good degassing effect.
(2) In the invention, in the smelting process of the alloy, graphite powder is used as a covering agent and hexachloroethane is used as a refining agent, the covering agent isolates alloy liquid from furnace gas so as to reduce alloy gas suction, oxidation and evaporation, and can also effectively separate an aluminum smelting furnace from the furnace so as to separate slag and aluminum and reduce the loss of aluminum, and the refining agent can remove non-metallic inclusions and gas in the alloy liquid and improve the quality of the prepared alloy lining plate.
Drawings
FIG. 1 is a flow chart of an impurity removal process in the production of an alloy lining plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be further described with reference to the following examples.
Example 1:
referring to fig. 1, an impurity removing process for manufacturing an alloy lining plate includes the following steps:
(1) taking the aluminum ingot and cutting off an oxide layer on the surface of the aluminum ingot.
By adopting the technical scheme: the method can avoid the influence on the subsequent preparation of the alloy lining plate caused by the fact that slag is brought into the molten aluminum after the aluminum ingot oxide layer is melted.
(2) And putting the stirring spoon, the slag removing spoon and the casting mould into a drying oven to be preheated to 250 ℃.
By adopting the technical scheme: preheating can ensure that the alloy liquid can not be splashed due to the surface quenching of the casting die during casting on the one hand, and also ensures the fluidity of the alloy liquid on the other hand, thereby being beneficial to obtaining the alloy with better surface quality.
(3) And putting the aluminum ingot into a smelting furnace for melting to obtain molten aluminum.
Specifically, when the aluminum ingot is melted, the method comprises the following steps:
(301) and preheating the smelting furnace.
(302) And putting the aluminum ingot into a smelting furnace, and completely melting the aluminum ingot at the temperature of 720 ℃.
By adopting the technical scheme: preheating the smelting furnace can improve the melting speed of the aluminum ingot, and the aluminum ingot is completely melted at 720 ℃.
(4) And degassing the molten aluminum.
Specifically, the degassing of the aluminum melt comprises the following steps:
(401) and inserting a graphite rotor of the rotary degasser into the aluminum melt.
(402) And the rotary graphite rotor sends degassing gas into the molten aluminum.
Specifically, the degassing gas is nitrogen.
Specifically, the rotating speed of the rotary graphite rotor is 200 r/min.
By adopting the technical scheme: the method adopts a rotary graphite rotor to blow degassing gas into aluminum liquid, break large bubbles into very small bubbles and disperse the bubbles in the aluminum liquid, sharply increase the surface area of purified gas by reducing the diameter of the bubbles, so that more bubble surfaces are contacted with hydrogen and impurities in the aluminum liquid, on the contact surface of the bubbles and metal, hydrogen is diffused into degassing bubbles according to the partial pressure law due to the pressure difference between the hydrogen pressure in the aluminum liquid and the degassing bubbles in the aluminum liquid, the hydrogen gradually slows down along with the approaching of the hydrogen pressure in the degassing bubbles and the hydrogen pressure in the aluminum liquid, when the degassing bubbles rise to the surface of the aluminum liquid, the hydrogen is carried in the atmosphere, good degassing effect is achieved, the rotating speed of the rotary graphite rotor is 200r/min, so that the sprayed bubbles can be diffused in the whole solution, if the rotating speed of the rotor is too slow, the bubbles can stay in the middle part of a rotary rod, if the rotor rotates too fast, the rolling may be intensified, and the latter will make the hydrogen and the inclusion re-enter the aluminum liquid.
(5) And adding an additive into the degassed aluminum melt to prepare the alloy melt.
Specifically, the additive is copper particles, magnesium strips and zinc particles, and after the additive is added, the alloy melt is prepared, which comprises the following steps:
(501) adding the copper particles into a smelting furnace at the temperature of 720 ℃, stirring the molten liquid by using a stirring spoon, uniformly scattering a covering agent on the molten liquid after the copper particles are completely molten, and taking out slag in the molten liquid by using a slag removing spoon.
(502) And heating the smelting furnace to 650 ℃, pressing the magnesium strip into the molten liquid, stirring the molten liquid by using a stirring spoon, and covering by using a covering agent.
(503) And (3) slagging off the molten liquid in the step (502), adding zinc particles, stirring the molten liquid by using a stirring spoon, uniformly scattering a covering agent on the molten liquid again, and slagging off.
Specifically, the covering agent is graphite powder.
Specifically, the magnesium strip is wrapped with aluminum foil and pressed into the melt.
Specifically, after adding the additive material into the aluminum melt after degassing, still include: and pressing a refining agent into the molten liquid, and covering a smelting furnace cover when no yellow gas is emitted, so as to fully refine the molten liquid.
Specifically, the refining agent is hexachloroethane.
By adopting the technical scheme: in the smelting process of the alloy, graphite powder is used as a covering agent and hexachloroethane is used as a refining agent, the covering agent isolates alloy liquid from furnace gas so as to reduce alloy gas suction, oxidation and evaporation, and can also effectively strip and separate an aluminum smelting furnace so as to separate slag and aluminum and reduce aluminum loss, the refining agent can remove non-metal inclusions and gas in the alloy liquid and improve the quality of the prepared alloy lining plate, an aluminum foil is used for wrapping a magnesium strip so as to reduce the burning loss of magnesium, and the purity of the alloy liquid can be provided by refining the alloy liquid.
(6) And casting the alloy melt into a casting mold, removing the casting mold after the alloy melt is completely solidified, and cooling the cast ingot in cooling sand.
By adopting the technical scheme: the defects of intragranular and regional segregation, brittle phase along the crystal distribution, coarse second phase crystal grains and the like caused by crystallization in an unbalanced state due to higher cooling speed in the casting process are reduced.
Example 2:
referring to fig. 1, the impurity removing process for manufacturing an alloy lining plate according to the present embodiment is substantially the same as that of embodiment 1, and the main differences are as follows: the degassing gas is argon, and the rotating speed of the rotary graphite rotor is 350 r/min.
The invention adopts a rotary graphite rotor to blow degassing gas into aluminum liquid, break large bubbles into very small bubbles and disperse the bubbles in the aluminum liquid, sharply increase the surface area of purified gas by reducing the diameter of the bubbles, so that more bubble surfaces are contacted with hydrogen and impurities in the aluminum liquid, on the contact surface of the bubbles and metal, because pressure difference exists between hydrogen pressure in the aluminum liquid and the degassing bubbles in the aluminum liquid, hydrogen diffuses into the degassing bubbles according to a partial pressure law, gradually slows down along with the approaching of the hydrogen pressure in the degassing bubbles and the hydrogen pressure in the aluminum liquid, when the degassing bubbles rise to the surface of the aluminum liquid, the hydrogen is brought into the atmosphere to achieve good degassing effect, in the smelting process of the alloy, graphite powder is used as a covering agent and hexachloroethane is used as a refining agent, the covering agent isolates the alloy liquid from furnace gas to reduce the gas suction of the alloy, and the alloy is dispersed in the aluminum liquid, Oxidation and evaporation, and can effectively strip and separate the aluminum smelting furnace, so that slag and aluminum are separated clearly, the loss of aluminum is reduced, the refining agent can remove non-metallic inclusions and gas in the alloy liquid, and the quality of the prepared alloy lining plate is improved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. An impurity removal process for producing an alloy lining plate is characterized by comprising the following steps:
s1, taking an aluminum ingot, and cutting an oxide layer on the surface of the aluminum ingot;
s2, placing the stirring spoon, the slag removing spoon and the casting mold into a drying box to be preheated to 250 ℃;
s3, putting the aluminum ingot into a smelting furnace for melting to obtain molten aluminum;
s4, degassing the molten aluminum;
s5, adding an additive into the degassed aluminum melt to prepare an alloy melt;
and S6, casting the alloy melt into the casting mold, removing the casting mold after the alloy melt is completely solidified, and cooling the cast ingot in cooling sand.
2. The process of claim 1, wherein the step S3 of melting the aluminum ingot comprises the following steps:
s301, preheating a smelting furnace;
s302, putting the aluminum ingot into a smelting furnace, and completely melting the aluminum ingot under the condition that the temperature of the smelting furnace is 720 ℃.
3. The process of claim 1, wherein the degassing of the molten aluminum in step S4 comprises the following steps:
s401, inserting a graphite rotor of a rotary degasser into the molten aluminum;
s402, the rotary graphite rotor sends degassing gas into the aluminum melt.
4. The process of claim 3, wherein the degassing gas is one of nitrogen and argon.
5. The impurity removing process for producing the alloy lining plate as claimed in claim 3, wherein in the step S402, the rotation speed of the rotary graphite rotor is 200-350 r/min.
6. The impurity removing process in the production of the alloy lining plate according to claim 1, wherein in the step S5, the additives are copper particles, magnesium strips and zinc particles, and the alloy melt is prepared after the additives are added, and the process comprises the following steps:
s501, adding copper particles into a smelting furnace at the temperature of 720 ℃, stirring the molten liquid by using a stirring spoon, uniformly scattering a covering agent on the molten liquid after the copper particles are completely molten, and taking out slag in the molten liquid by using a slag removing spoon;
s502, heating the smelting furnace to 650 ℃, pressing a magnesium strip into the melt, stirring the melt by using a stirring spoon, and covering by using a covering agent;
and S503, slagging off the molten liquid in the step S502 again, adding zinc particles, stirring the molten liquid by using a stirring spoon, uniformly scattering a covering agent on the molten liquid again, and slagging off.
7. The impurity removing process for producing the alloy lining plate according to claim 6, wherein the covering agent is graphite powder.
8. The process of claim 6, wherein in step S502, the magnesium strip is wrapped with aluminum foil and pressed into the melt.
9. The process of claim 1, wherein in step S5, after adding an additive to the degassed aluminum melt, the process further comprises: and pressing a refining agent into the molten liquid, and covering a smelting furnace cover when no yellow gas is emitted, so as to fully refine the molten liquid.
10. The process of claim 9, wherein the refining agent is hexachloroethane.
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| CN105734369A (en) * | 2016-04-21 | 2016-07-06 | 辽宁忠旺集团有限公司 | Hot top casting process for phi 784-mm 7xxx-series superhard aluminum alloy round bar |
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Application publication date: 20210806 |